Make sure you can run 'ant -version', and also try:
export JAVA_HOME=/home/neale/icedtea6-1.4.1/bootstrap/jdk1.6.0
ant -version
If that doesn't work, then you need to track that down.
I usually download my own ant 1.7.0 in my home directory and use that.
I've had problems with the ant's placed
After upgrading make from 3.80 to 3.81, my build of icedtea6-1.4.1 is
progressing. It runs for a number of hours, completes building in
openjdk-ecj and appears to start building within openjdk where it comes to a
halt with:
make[2]: Entering directory
`/home/neale/icedtea6-1.4.1/openjdk/langtools/